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1 <?php |
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2 |
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3 /** |
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4 * |
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5 * "Pre-filter" the source text. |
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6 * |
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7 * @category Text |
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8 * |
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9 * @package Text_Wiki |
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10 * |
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11 * @author Paul M. Jones <pmjones@php.net> |
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12 * |
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13 * @license LGPL |
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14 * |
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15 * @version $Id: Prefilter.php,v 1.3 2005/02/23 17:38:29 pmjones Exp $ |
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16 * |
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17 */ |
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18 |
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19 /** |
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20 * |
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21 * "Pre-filter" the source text. |
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22 * |
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23 * Convert DOS and Mac line endings to Unix, concat lines ending in a |
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24 * backslash \ with the next line, convert tabs to 4-spaces, add newlines |
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25 * to the top and end of the source text, compress 3 or more newlines to |
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26 * 2 newlines. |
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27 * |
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28 * @category Text |
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29 * |
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30 * @package Text_Wiki |
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31 * |
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32 * @author Paul M. Jones <pmjones@php.net> |
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33 * |
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34 */ |
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35 |
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36 class Text_Wiki_Parse_Prefilter extends Text_Wiki_Parse { |
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37 |
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38 |
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39 /** |
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40 * |
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41 * Simple parsing method. |
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42 * |
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43 * @access public |
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44 * |
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45 */ |
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46 |
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47 function parse() |
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48 { |
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49 // convert DOS line endings |
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50 $this->wiki->source = str_replace("\r\n", "\n", |
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51 $this->wiki->source); |
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52 |
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53 // convert Macintosh line endings |
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54 $this->wiki->source = str_replace("\r", "\n", |
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55 $this->wiki->source); |
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56 |
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57 // concat lines ending in a backslash |
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58 $this->wiki->source = str_replace("\\\n", "", |
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59 $this->wiki->source); |
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60 |
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61 // convert tabs to four-spaces |
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62 $this->wiki->source = str_replace("\t", " ", |
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63 $this->wiki->source); |
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64 |
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65 // add extra newlines at the top and end; this |
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66 // seems to help many rules. |
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67 $this->wiki->source = "\n" . $this->wiki->source . "\n\n"; |
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68 |
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69 // finally, compress all instances of 3 or more newlines |
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70 // down to two newlines. |
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71 $find = "/\n{3,}/m"; |
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72 $replace = "\n\n"; |
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73 $this->wiki->source = preg_replace($find, $replace, |
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74 $this->wiki->source); |
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75 } |
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76 |
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77 } |
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78 ?> |